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C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
C10C3/023—Working-up pitch, asphalt, bitumen by chemical means reaction with inorganic compounds
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FR373775D1907-01-211907-01-21Méthode pour traiter les goudrons et les poix pour les rendre plus aptes à divers emplois industriels
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